Nobsound E6 Pre-amp: 2J27L Tube Replacement

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This is a short video on how to replace the cheap/noisy China 2J27L tubes that come in these, with some higher quality 2Ж27Л replacements off ebay. You can get 4 of these NIB for under $10.
You can buy this amp here:
amzn.to/3HqbI2n
Here is my Patreon, as well as the donation page at my site, if you feel so inclined to help fund some of the future projects for the channel!
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Опубликовано:

11 окт 2024

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Комментарии : 20

@edwardallan197 14 дней назад

I love my E6. I had to straighten one tube pin a bit. I then had various known & discussed symptoms. I examined and corrected a few female socket pin grabbers. Cleaned the pins carefully, and lightly lubed. Now all is perfect. Chinese tubes are equal & sound great. No microphonics or touch sensitivity at all.

@thinkIndependent2024 Год назад

I wish you made this before mid April that when I just had to figure it that being said your methodical process is GREAT so many videos on RU-vid where it's easy to tell they know a little about the first step and have not thought at all about the second step. I now use it with a power supply that has low put of band of audio low ripple but Im sure U could easily whip up 5 volt 500 milliamps linear power supply

@tebbi67 Год назад

Your advice to use tubes from the old USSR is based on the fact that there was no obsolescence in production back then. Often, you can tell by the weight that all parts, including the heating element, were optimized for decades of use...The technology was largely stolen from Germany during WWII and used for their own production in Russia after the war.....we said Klingonentechnology because they are so massiv........thx for the vid!

@dtg474 Год назад

Very interesting little preamp

@simonzinc-trumpetharris852 21 день назад

Sounds amazing.

@jeanlawson9133 Год назад

What and how are these little preamp being utilized.... Love your videos..

@SkunkieDesignsElectronics Год назад

Sorta like the "color" pre-amp I am building.

@bob_mosavo Год назад

Thanks 👍

@paulgood2218 Год назад

Nice video

@jukingeo 6 месяцев назад

I was looking at this small preamp, but heard about the tube problems, so now the question I have is, did the Russian tubes fix the problem and how do they sound?

@SkunkieDesignsElectronics 6 месяцев назад

It wasn't as bad, but still was noisy and didn't sound good to my ears.

@jukingeo 6 месяцев назад

@@SkunkieDesignsElectronics Thanks for the input. I generally seem to be put off by directly heated output tubes. The problem is noise, which gets worse with the higher voltages on the filament. Thus DC filaments is the way to go with those. BUT I been hearing that DC filaments changes the sound quality. At any rate, I decided not to go down this rabbit hole because of the need to have separate filament supplies. It just adds to the complexity of the design.

@simonzinc-trumpetharris852 21 день назад

Use some attenuators at the power amp input. Solves the problem nicely.

@igormoh6888 Год назад

Hello! How good would a headphone amp sound with these tubes?

@SkunkieDesignsElectronics Год назад

Not sure, haven't really evaluated this pre-amp yet other than knowing the tubes it came with were super noisy.

@formercakid Год назад

I have one and it's not noisy at all..?

@SkunkieDesignsElectronics Год назад

Some are, some aren't. Mine SCREAMS but is worse with the tubes it came with. Seems these tubes are being used outside of their designed use/range and luck of the draw if they work or not.